Improvement in ornamenting metal surfaces



K. G'ODDARD.-

Urnamenting Metal Surfaces.

1 No.15'2,741; ,Paten-tammy 1.1814,

UNITED STATES PATENT OFFICE.

KINGSTON GODDAR-D, OF RICHMOND, NET YORK.

IMPROVEMENT IN ORNAMENTING METL SURFACES.

Specification forming part of Letters Patent No. 152,741', dated July 7,1874 application tiled April 20, 1874.

To all whom it may concern:

Be it known that I, KINGSTON GODDARD, of the town and county ofRichmond, State of N ew York, have invented a new Improvenient inOrnamenting Metallic Surfaces, of which the following is a specificationThis invention has for its object to marbleize metallic surfaces withmetal, in which surfaces one metal Will form the ground and the otherthe veins.

The principle of the invention is based upon the different degrees ofhardness of the ses* era-l metals. The invention consists inelectroplating an ingot of a soft metal with a harder metal, and thenrolling out the ingot so covered, whereby the harder metal is torn orbroken into veins that are pressed into the surface of the softer metal,thus obtaining a beautiful and rich effect.

In the drawing, Figure 1 represents a 1011- gitudinal section of aningot electroplated as stated and partly rolled out; and Fig. 2 is a topor laee View of the same.

Similar letters of reference indicate correspending parts in bothfigures.

The in got A, which may be made of lead or other soft metal, is, byelectroplatiug or other equivalent process, covered with a thin film ofgold, B, or other metal harder than that used in the ingot. Thereuponthe ingot is submitted to pressure between two rollers or otherwise, anddrawn out, as shown at the right-hand end of Fig. l, into a thin sheetor foil. The soft metal A, being thus drawn out, attempts to carry theharder metal with it 5 but as the resistance which is offered to thegold or other harder metal by the lead is less than the resistanceoffered by the tenacity of the gold, the consequence will be that thegold,

instead of being carried over the lead into a still finer film than thatin which it was applied, Will not be drawn out, but will be torn intoveins or transverse fragments, Which are bent and'further rupturedduring the continued rolling process, thus forming marble-like veins,substantially as indicated in Fig. 2.

rllhe more the rolling process is continued the liner will be the veins,and it is certain that a Very beautiful effect is produced by thisprocess, which a pen-and-iuk drawing is not capable of reproducing'.

The invention may be used. in all kinds of metals, the only thingnecessary being the use of a film of a harder metal on an ingot of asofter metal, and the subsequent rolling out of the ingot to produce theveins described.

I claim as my invention- Vl. The process herein described ofornainenting metal by plating', electroplating, or otherwise covering aplate, bar, or ingot of soft metal With a thin film and then rolling outor pressing the ingot into a sheetkwh'ereby the coating is broken intoirregular forms, and a marbleized appearance produced on the surface ofthe sheet, substantiall y as specified.

2. As a new article of manufacture, a plate or sheet of marbleized metalcomposed of a core or body of soft metal and a coating of harder metaldrawn out and broken into irregular forms and distributed over thesurface of the body in the process of rolling or pressing, substantiallyas described and shown.

KINGSTON GODDARD.

IVitnesses:

M. S. GoDDARD, A. V. BRIEsEN.

of harder metal, i

